Spring Equinox – Vernal Equinox
The Vernal (Spring) Equinox in the Northern Hemisphere is the Autumnal (Fall) Equinox in the Southern Hemisphere and vice versa.
Not Entirely Equal Day & Night
On the equinoxes the Sun shines directly on the equator and the length of day and night is nearly equal – but not quite.
The March equinox marks the moment the Sun crosses the celestial equator – the imaginary line in the sky above the Earth’s equator – from south to north and vice versa in September.
Northern Hemisphere Vernal Equinox
(USA, Central America, Canada, Europe, Asia, northern Africa)
March Equinox in Seattle, Washington, USA is on
Monday, March 20, 2017 at 3:29 AM PDT (Change city)
March Equinox in Universal Coordinated Time is on
Monday, March 20, 2017 at 10:29 UTC
Southern Hemisphere Vernal Equinox
(Australia, New Zealand, South America, southern Africa)
September Equinox in Seattle, Washington, USA is on
Thursday, September 22, 2016 at 7:21 AM PDT (Change city)
September Equinox in Universal Coordinated Time is on
Thursday, September 22, 2016 at 14:21 UTC
First Day of Spring?
In the Northern Hemisphere, the Vernal (Spring) Equinox marks the first day of astronomical spring. There's also another, more common definition of when the seasons start, namely meteorological definitions, which are based on average temperatures rather that astronomical events.
In This Article
- Not Entirely Equal Day & Night
- Northern Hemisphere Vernal Equinox
- Southern Hemisphere Vernal Equinox
- First Day of Spring?